Identify digital derivatives

Given the set of Digital Objects, find the complete sets of derivative objects.

"GTW_brosnan_b106_e0008_1.tif"
"GTW_brosnan_b106_e0008_2.jpg"
"GTW_brosnan_b106_e0008_3.jpg"
"GTW_brosnan_b106_e0054_1.tif"
"GTW_brosnan_b106_e0054_2.jpg"
"GTW_brosnan_b106_e0054_3.jpg"
"GTW_brosnan_b106_e0055_1.tif"
"GTW_brosnan_b106_e0055_2.jpg"
"GTW_brosnan_b106_e0055_3.jpg"
"GTW_brosnan_b106_e0065_1.tif"
"GTW_brosnan_b106_e0065_2.jpg"
"GTW_brosnan_b106_e0065_3.jpg"
"GTW_brosnan_b106_e0n01_1.tif"
"GTW_brosnan_b106_e0n01_2.jpg"
"GTW_brosnan_b106_e0n01_3.jpg"
"Thumbs.db"

The Digital Derivatives rule will help perform this function.

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Default Match Rule

In order to make this rule flexible, the user must enter a regular expression match to help identify common sets of items. The default pattern is shown here. Match: ^(.*?).[^.]+$

^ - beginning of name
(.*?) - grab any character, the parentheses make this group #1
.[^.]+ - grab everything following the final period (including the period)
$ - end of the name Replacement:
pull the contents that match the first parentheses group File Extensions Required: .tif,.jpg
look for tif files and jpg files Note that the following results are not very helpful because the derivatives are not grouped together.

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Customized Match Rule

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Match: ^(.*?)(_\d)?.[^.]+$

^ - beginning of name
(.*?) - grab any character, the parentheses make this group #1
Note the *? makes this a non-greedy rule
(_\d)? - Look for _ + a digit preceding the file extension
.[^.]+ - grab everything following the final period (including the period)
$ - end of the name Replacement: $1
pull the contents tha* t match the first parentheses group File Extensions Required: .tif,.jpg
look for tif files and jpg files

The new results are an improvement screen-shot